Shannon and Gabby had equal amount of money. Each day, Shannon spent $9 and Gabby spent $16. When Shannon had $81 left, Gabby had
29 as much money left as Shannon. How much money did the two girls have at first?
| |
Shannon |
Gabby |
| Before |
9 u + 81 |
16 u + 18 |
| Change |
- 9 u |
- 16 u |
| After |
$81 |
$18 |
Amount that Gabby had left
=
29 x 81
= $18
The amount that Shannon and Gabby had at first is the same.
16 u + 18 = 9 u + 81
16 u - 9 u = 81 - 18
7 u = 63
1 u = 63 ÷ 7 = 9
Amount that Shannon had at first
= 9 u + 81
= 9 x 9 + 81
= 81 + 81
= $162
Total amount that both girls had at first
= 2 x 162
= $324
Answer(s): $324
